Typewriting machine



Jan. 1, I

W. F. HELMOND 4 TYPEWRITING MACHINE File Dec. 8. 1921 Fly hvenfor:

-AffZZ-:ey,

Patented Jan. 1, 1924.

UNITED STATES ATET OP WILLIAM F. HELMIONI) OE HARTFORD, CONNECTICUT,ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., ACORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

To aZZ whom it may concern:

Be it known that I, W LLIAM F. HnLMoND,

a citizen of the United States, residing in Hartford, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Typewriting Machines, of which the following is a secification.

his invention relates to improved means for guiding lengthy carriages oftypewritin machines.

eretofore short carriages of machines, the Underwood typewritingmachines, for example, have been provided with lugs or collars, toembrace a rod or bar secured to the main frame of the machine. Thesecollars guided the carriage at the rear. The

front of the carriage is usually provided with a roller to bear on afront rail. To use the guiding collars for a long carriage machine hasheretofore been found objectionable, due to excess friction of thecollars on the guide-rod. Instead of collars, rollers have been resortedto for this purpose'in long carriage machines. In some'instances thisroller construction'ha-s been found objectionable, since the carriagevibratesslightly endwise when arrested. j

An object of the invention is to overcome the above-mentioned objectionsin connection with long carriage machines. To this end, the longcarriage is provided with guide-collars, one at each end ofsaidcarriage, and there is provided one anti-friction. roller located nearone of the guide-collars,

so asto relieve the one guide-collar of the weight of the carriage. Theothercollar bears directly on the guide-rod. Thus, with a collarbearing-directly on the rod at one end of the carriage and ananti-friction roller bearingron the rod at the other end, the carriagefeeds withsuflicient freedom, and the objectionable vibration abovementioned is avoided.

Other features and advantages willhereinafter appear. j

In the accompanying drawings,

Figure 1 is a sectional side view of an Underwood typewriter carriage,showing the invention applied thereto.

Figure 2 is a rear view of the carriage, showing the location of theanti-friction roller relatively tothe guide-collar at the right-hand endof the carriage.

Figure 3 is a detail sectional side view,

showing the construction of. the anti-friction roller and the adjustmentthereof. I

In a typewriter carriage 10 is revolubly v mounted a platen 11, againstwhich typebars 12 strike. The carriage is fedfrom right to left by theusual escapement mechanism (not shown), 'To guide the carriage there areprovided on the main frame 13 afront rail 14 and a rear rail 01- rod 15.

. The carriage is supported on the frontrail by rollers 16. suitablymounted on the front bar 17 of the carriage. The guidingmeans at therear of the carriage comprises'the rear rail 15, which is embraced bytwolugs or collars 18, one'fixed upon each end of the rear bar 20 0fthe-carriager It has-been .foundthat, when this construction is usedright-hand collar '18, so as to prevent it from- 7 bearing directly onthe guide-rod. Since the weight of the carriage is supportedat this endby the roller'21, -the right-hand collar serves merely as a guide. notbeing a supportfor the carriage weight,.andnot resting upon the top ofthe rail.

The anti-friction roller 21 is provided with, ball-bearings 22 containedwithin a V-shaped groove 23 within the roller,and a V-shaped groove 24cformedby two "cones 2i and ,26, which are adjustable relatively to eachother to take up looseness: The cones may be. separated from each otherby a ring- 27 of copper or other softrwire, which may readilybesqueezedv during the adjustment of the cones 25 and 26 by tightening, ascrew' 28 threadedinto a shank 30.

The'roller 21 is provided with 81, and the roller is angularly disposedrelatively to the guide-rod 15, so that the engage ing portion of theface 31 bears substantially horizontally on said guide-rod; The shank 3Oextends perpendicularly fromthe roller21, and consequently is inclinedin opposite direction, thus enabling the roller to be adjusted to bearproperly on the guide-rod. To facilitate the adjustment of the roller21, the shank 30 of said roller is received in a hole 32 in a bracket 33suitably secured to the rear bar 20 of the carriage, the shank a conej-fface 30 being held in place when adjusted by a set-screw 34 threadedinto a boss 35 of said bracket. I r V l/Vith this arrangement, theconstruction for guiding a long carriage is considerably simplified,1andpermits feeding with the requisite freedom of movement withoutchattering or endwise vibration at the arrest of the carriage, thisimprovement being of special value in tabulating, and also advantageousduring the letter-feeding movements of the carriage.

Variations may be resorted to within the scope of the invention, andportions of the improvements maybe used without others.

'Having thus described my invention, I claim:

1. In a typewriting machine, the combination of a carriage, and guidingmeans 7 for said carriage, said guiding means compr sing a rail,carriage-supporting ClQVlCQS' to slide on the top of said rail, andadistant carriagesupporting device to roll on the top of said rail,;saidsliding device and said distant rolling device forming the entiresupport of said carriage upon said rail.

2. In a typewriting machine, the combination of a carriage, andguiding-means for said carriage, said guidingmeans com prising a rod, aplurality of'guide-collars secured to said carriage to embrace said rod,

and a carriage-supporting roller mounted on said carrlage to roll on thetop of said rod,

said roller adjacent'to one of said collars,

to relieve it from the weight of the carriage, while leaving the othercollar supporting the carriage weight.

3. In a typewriting machine, the combination of a carriage, andsupporting and guiding means for said carriage, said supporting andguiding means comprising a rail, two guide-collars secured to saidcarriage to embrace said rail, a roller mounted on said carriage to rollon said rail, near one collar, and adjustable means co-operative withthe roller to relievethe neighboring collar of the weight of thecarriage,

the other collar bearing on theftop ofthe rail and constituting apartial support for the weight of the carriage.

4. In a typewriting machine, the combination of a carriage, andsupporting and guiding means for said carriage, said supporting andguiding means comprising a rail, two guide-collars secured tosaidcarriage to embrace said rail, a roller mounted on said carriage to rollon said rail, near one collar, and adjustable means co-operative withthe roller to relieve the neighbor-' ing collar of the weight of thecarriage, the

other collar bearing on the top of the rail and constituting a partialsupport for the 7 .tor said carriage, said guiding means comprising arail, two guide-collars secured to said carriage to slide on said rail,one of said collars affording a support for the weight of the carriage,a roller mounted on said carriage to roll on said rail, near the otherof said collars, said ,rollerbeing inclined and having a beveled face tobear on said rail, the efiective portion of the bear ing face beingsubstantially horizontal, a

bearing shank for said roller, said shank being adjustable to effect anadjustment of said roller relatively to said rail, and'means' to securesaid shank in its adjusted position.

.6. In a typewriting machine, the combination of a carriage, andguidingmeans for said carriage, said guiding means comprising a fixedrail, two guide-collars, one

at 'e'ach'end of said carriage to embrace said rail, and a rollermounted on said carriage in close proximity to the right-handguide-collar to prevent the latter from bear- I ing on-said rail in thetraveling movement of said carriage, the left-hand collar co operatingwith said roller to constitute the entire support of the carriage ,uponsaid' rail.

7. In a typewriting machine, the bination of a carriage, andguidin'gmeans for said carriage, said guiding means comprising a fixed rail, twoguide-collars, one at each'end of said carriage to embrace said rail,and a roller'mounted onsaid carriage omo in close proximity to theright-hand guide- 7 I collar to prevent the latter from bearin on saidrail in the traveling-movement .0? said carriage, the left-hand collarco-operat ing with said roller to constitute the entire support of thecarriage upon said raiLtand rollers at the front of the carriage toassist in guiding the latter. V a V WILLIAM F. *HEIJMOND. Witnesses: I

EDWARD AMERMAN, WILLIAM P. SMITH.

